At the time of their debut, they were considered to be the "youngest" South Korean girl group with an average age of below 13.5.
The age of their youngest member, Janey, caused controversy followed by the debut of a much younger girl group, G-story, who were all below 10 years old.
In November 2010, the youngest member, Janey, was prohibited from performing on music shows due to new regulations regarding age.
The youngest member, Janey, garnered much interest due to her exceptional confidence, rapping and dancing skills on stage despite her young age.
On January 1, 2014, the group's official Facebook photo was changed to announce their comeback in February 2014.